Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2711
Title: Graphene Oxide Sheathed ZIF-8 Microcrystals: Engineered Precursors of Nitrogen-Doped Porous Carbon for Efficient Oxygen Reduction Reaction (ORR) Electrocatalysis
Authors: Minju, T
Rajith, I
Sreekumar, K
Nair, B N
Peer Mohamed, A
Anilkumar, G M
Takeo, Y
Hareesh, U S
Keywords: graphene oxide
oxygen reduction reaction
N-doped carbon
porous carbon
alkaline fuel cell
Issue Date: Oct-2016
Publisher: American Chemical Society
Citation: ACS Applied Materials and Interfaces, 8(43):29373-29382
Abstract: Nitrogen containing mesoporous carbon obtained by the pyrolysis of graphene oxide (GO) wrapped ZIF-8 (Zeolitic Imidazolate Frameworks-8) micro crystals is demonstrated to be an efficient catalyst for the oxygen reduction reaction (ORR). ZIF-8 synthesis in the presence of GO sheets helped to realize layers of graphene oxide over ZIF-8 microcrystals and the sphere-like structures thus obtained, on heat treatment, transformed to highly porous carbon with a nitrogen content of about 6.12% and surface area of 502 m2/g. These catalysts with a typical micromeso porous architecture exhibited an onset potential of 0.88Vvs RHE in a four electron pathway and also demonstrated superior durability in alkaline medium compared to that of the commercial Pt/C catalyst. The N-doped porous carbon derived from GO sheathed ZIF-8 core–shell structures could therefore be employed as an efficient electrocatalyst for fuel cell applications.
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